Driving-pulley magneto



R. A. OGLESBY.

DRIVING PULLEY MAGNETO.

APPLICATION FILED III/IIIA I9, 19u.

ASL Tatene Mar. 7, 1922 IIIIIIIIIIIII'IIImI! 'WIWI maman A. oeLEsBY,

OF SOUTH BEND, INDIANA, ASSIGNGR TO QICK IACJTION IGNITION COMPANY, '0F SOUTH BEND, INDIANA, A. CORPORATION 0F INDIANA.

DBIVING-P'ULLEY MAGNET@ Specication of Letters Patent.

- Patented Mar. 7,1922.

Application led March 19, 1917. Serial No. 155,919.

To all -wlzom it. my concern Be it known that RICHARD A. OGLEsBY, citizen of the United States, residing at South Bend, in the county of St. Joseph and State of Indiana, has invented certain new and useful Improvements in Driving-Pulley Magnetos, of which the following is a specification.

My invention relates to improvements in driving pulley magnetos and. it appertains more especiall to the features pointed out in the annexe claims.

The purpose of my invention is to provide a combined driving pulley and magneto in which the magnet is rotated by the pulley and the armature is held stationary on any adjacent part of an engine frame or casing; that effects large economies in production; simplicity in assembling and reliability of operation and that avoids a separate fly wheel etc., as heretofore used on motor-cycles etc., wherein a belt drive is employed.

With these and other ends in view I illustrate such instances of adaptation in the accompanying drawing asv will disclose the broad features without limiting myseli to the specific details shown.

Fig. 1 shows a cross section of a driving pulley and a magnet secured thereto.

Fig. 2 shows a cross section of-a modified form of attachment where the ily wheel is of larger diameter than its attached pulley.

Fig. 3 shows another method of attaching the magnet element as a separable unit to a combined fly wheel and driving pulley.

Fig. 4 is an elevation of a detached magnet holding ring. s

Fi 5 is an elevation of the reverse side of Fig. 4 showing a magnet in position.

Figs. 6 and 7 show another exemplication for adapting a magnet holder to various diameter driving fly wheels.

In Fig. 1 an armature plate is shown in its related position to the magnet and in Fig. 2 the plate is omitted. n

An important feature of this invention resides in the use that can be made of an ordinary ily Wheel and a belt driven adaptation thereof combined with a magneto field magnet. In ordinary practice heretofore 1t has been generally customary to use dy wheels for momentum control of variable power impulses and employ se arate drivlng pulleys, etc., the Hy wheel being attached to one end of a crank shaft and the driving pulley to the other end or both separately connected to one end of the shaft performing their several functions independently of each other.

In the adaptations illustrated in the accompanying drawing all the functions of steadying the rotative effort, driving other mechanisms, and supporting the field magnet of a magneto are combined in one device. Fly wheel magnetos have been produced but of a type which limits them to very specific adaptations. In the disclosure herein made the main magneto parts are standardized so as to be available, without material change, for`va-rious radical departures as to diameters, weightss etc., of fly wheels used on motor cycles or for other purposes so as to meet whatever exigencies as to speed ratios between the rotating ily-wheel and any driven unit that may exist.

The exemplifications shown substantially comprise any available shaft 1 to which a standardized center pulley support 2. is attached by means of a hub 3 in any desired manner. This support has a flange 4 which with the integral parts 2 and 3 is shown in elevation. By means of this flange various forms of magnet casing, driving pulley fly Wheels, or detached pulleys may be secured.

When a light weight fly wheel of small diameter is to be used as a pulley and holder for a field magnet, a web 5 is attached to the ilange 4 of the center support 2 by means of rivets, Screws, etc. The web has a rim 6 with flanges 7 between which a belt 8 traverses. In cases where a vheavy ily Wheel is required the rim 9 is used as shown in Fig. 3 having anges 7 and a web l() formed integrally with a hub or the web 10 ma-y be attached to a center 2 as desired, however the magnet supporting ring 29 shown attached to the rim 9 by screws 30 may be placed directly on the outer face of the hy wheel shown in Fig. 6 by using round headed screws 34 and. inaking the holes 35 slightly larger than required so that the ring 29 may be easily centered and when so placed other holes 37 maybe drilled through the ring 29 and into the rim 9 for permanently securing both to each other by shoulder screws 36' which have smaller diameter threaded ends 38 or in any other way desired. The ilange 29 may be made large enough to accommodate various diameters di wheels as shown in F ig. 6. 0r within certain ranges of diameter variations lll) ' 4 by bolts 17 or in any other way.

generallyv speaking the the rings 29 may be adapted to existing fly Wheels by dressing the radial ribs 39 to adapt them to the inside of the fly wheel rim thereby avoiding the machining of this surface of the fly wheel.

When the driving pulleylto meet special requirements must be smaller than the required magnet diameter the expedient instanced in Fig. 2 may be adopted. In this the fly Wheel function is a minimum and only a thin supporting casing, 11 having a rim12 is utilized. The magnet 18 is secured to the rims or 12 in any suitable manner by screws or otherwise. Casing 11 is attached to the center support 2 against flange Outside of flange 4 an external hub may be formed on the central support 2 on which and against the outer face of flange 4. a web 13 o grooved pulley 14 is attached over Which a. round belt 15 may pass.

The permanent magnet 18 may have pole extensions 26 that When the magnet is rotated by shaft 1 pass adjacent to and radially external of armature heads 23 between which the armature Winding 22 is placed. The heads are attached to a relatively stationary plate 24 that is provided with a hub 25 supported on a hub 28 of any adjacent structure 27. The relation of the armature heads 23 to the -pole pieces 26 is not shownrin Fig. 5 because it is of secondary import in this general relation.

An annular ring plate 19 shown in section on Figures 1 and 2 carries a projection or cam 20. The plate is held Von the hub ofthe center piece 2 in an suitable manner so as to actuate the circuit breaker 21 once for each revolution of the magnet 18. It may be secured from the outside of center support 2 so as to Vbe adjustable if desired in a number of obvious Ways, though detail phases of production are such that ...the'position of the fcam remains practically constant in relation tothe air gap of the magnet 18.

To further assist in holding the magnet 18 in position on th'e non-magnetic ring 29 an axial projection 31 is formed as shown in Figs. 3, 1 and 5. This has a radial flange 32 adapted to abut the magnet 18 across and to one side of the air gap. A narrow flange 33 assists in retaining the magnet against axial displacement at a point about opposite the air gap.

The Wheel 5 and casing 11 as Well as the ring are formed of non magnetic material to prevent `undue divergence of magnetic lines to one side of the magnet air gap. For this reason the magneto can be attached to an ordinary cast iron ily wheel 9 otherwise it would be inefficient practice to combine a magnetisa le driving fly Wheel and a permanent magnet when secured directly to t each other. This inefliciency would be due .as to to the fact that such material would form a separate path for the magnetic lines, exterral of and to one side of the magnet air gap thereby reducing the density of the flux through the armature heads and winding 22 to such an extent as to seriously weaken the impulses generated therein.

What I claim is, 1. In pulley magnetos, a rotatable shaft, a 'combined flywheel and pulley of magnetic material secured to such. shaft, a ring shaped magnet support of non-magnetizable material having a radial flange thereon adapting the same to various wheel diameters, a field magnet having an air gap therein attached to the inside of lthe support, a relatively stationary armature held near the path of travel of the magnet adapted to be energized to produce periodic currents therein Whenever the magnet is caused to pass the armature as the shaft is rotated.

2. In pulley magnetos,

a magnetizable Wheel, a permanent ring shaped magnet, an

annular flanged su port therefor of nonmagnetic `material p aced between the Wheel and the magnet, and means for holding the parts in assembled relation.

3. In magnetosya rotatable shaft, a pulley secured thereon, a ring shaped nonmagnetic flanged magnet holder attached to the pulleyl on one side thereof, a permanent magnet having an air gap, fastened to the y holder, a flange on the holder opposite the air gap and a relatively stationary armature plate held adjacent to the path of travel of the magnet.

4. In magnetos, a rotatable shaft, a magnetizable pulley wheel secured thereon, a permanent magnet having an airl gap, a nonmagnetic carrier for said magnet having means thereon adapting the same for attachment to differentV sizes of pulleys, a flange of said carrier opposite the air gap to space the saine from the pulley wheel so revent excessive shunting of magnetic lines through the pulley, and means for retaining the parts 1n assembled relation to each other.

5. In magnetos, a inagnetizable pulley secured to a rotatable shaft, a non-magnetic carrier, a (projecting flange thereon adapted to be fitte to pulleys of different diameters and a permanent magnet having an air gap, supported on the carrier with a portion of the carrier interposed between it and the pulley. v

6. In magnetos, a rotatable shaft, a driving pulley secured thereon. a ring shaped non-magnetic support for a field magnet, an external flange thereon adapted to be attached to pulleys of various diameters, 'a permanent magnet held Within the support. said magnet having an air gap, an internal flange ofthe support between the air gap and the pulley, and another flange about opposite the air gap adapted to limit the axial position of theJ magnet on the support.

7. In magnetos, :i rotatable shaft, a driving pulley attached thereto` a field magnet having an nir gap carried by the pulley, :in attachuble support magnetically spacing the magnet from the pulley throughout its eircumference including the air gap; radial llanges to said support adapted to secure 10 the same to pulleys of various diameters, to 

